SUMMARY

Characteristics of gold mineralization in Ya Hội area, Gia Lai Province

Trần Ngọc Khai, Đỗ Ngọc Chuân, Mai Kim Vinh, Đặng Văn Rời

Detailed survey results shown that gold mineralization in Ya Hội area which formed during Late Paleozoic-Early Mesozoic stage and helping to do clearly the potential of gold mineralization in Kon Turn metallogenic and tectonic zone. Type of gold mineralization is quartz-sulfide formation which including 2 types of mineralization: gold-quartz-pyrite and quartz-gold-polymetallic sulfide. They are under the control of tectonic fracture zones which mainly extends to the northeast - southwest strike. Most of gold ore bodies like vein net, pocket chain, uncontinuous in strike, thickness of 0.2 to 1.0 m and length of 100-280 m, dip angle is near vertical; Au content varies strongly, major content is 1.0 to 5.0 g/t. Natural resource reserves of (334a + 334b) grade is 316.4 kg of gold (of which grade of 334a is 173.5 kg). Besides major gold mineral, this area also has fluorite and radiative mineral (Uranium nature) which related to hydrothermal alteration of rock beside quartz-sulfide vein, this type needs to continue to research clearly. Thus, it may discover additional gold mineralization, fluorite, radiation zones... in neighborhood sheet groups.

Người biên tập: TS. Đỗ Quốc Bình.